Paccar SmartAir eHVAC System Service Manual Download Page 11 | Manualshive

Page: 11 / 40

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Figure 9.

Battery Separator Solenoid, located in the
battery box.

Page

11 of 40

Number

PM820010

HVAC: SmartAir eHVAC System

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Summary of Contents for SmartAir eHVAC System

Page 1: ...ith the working components of the Peterbilt SmartAir eHVAC System and the proper steps and procedures to completely diagnose the Peterbilt SmartAir eHVAC System unit 2019 PACCAR Corporation Confidenti...

Page 2: ...le 10 F Discharge Temperature Sensor Freeze Switch 10 G Evaporator Blower 10 H Condenser Fan 10 I Battery Management System BMS 10 J Battery Separator 10 INTERNAL COMPONENTS 12 A High Pressure Switch...

Page 3: ...d Linear Power Module Testing 20 K Compressor Rubber Mounts 20 L Testing the Battery Management System BMS 21 M Can Bus 22 N Testing the Espar Heater Connected to the EHVAC Digital Controller 22 O Con...

Page 4: ...box 11 Figure 10 High Pressure Switch 12 Figure 11 Compressor 12 Figure 12 Thermal Limit Switch on Compressor 12 Figure 13 Evaporator Inlet Filter 12 Figure 14 Relay Testing 18 Figure 15 Service Equip...

Page 5: ...d oil manufacturers If accidental system discharge occurs ventilate work area before resuming service CAUTION The air conditioning system uses HFC134a R134a refrigerant and polyvinyl ether PVE refrige...

Page 6: ...ttery negative cable from both battery boxes and dis charge any capacitors Disconnect the air starting motor if equipped to pre vent accidental engine starting Put a DO NOT OPERATE tag in the operator...

Page 7: ...heavier than air and can accumulate near the floor in sumps and low lying areas Close the manual fuel valves prior to performing maintenance and repairs and when storing the vehi cle inside California...

Page 8: ...and Relays Units built 8 1 2016 to Present F1 Fuse 10 Amp Mini This fuse provides short circuit protection for the System control NOTE Removing fuse F1 for 10 15 seconds will reset the sys tem contro...

Page 9: ...ge to the compressor controller C Fan and Temperature Control Display LED Display Allows for temperature and Blower speed adjustment of the EHVAC Electrical Heating and Ventilation Air Condi tioning u...

Page 10: ...Figure 7 Evaporator Blower and Condenser Fan I Battery Management System BMS This device monitors the auxiliary batteries for state of charge communicates with the EHVAC system and con trols the batt...

Page 11: ...Figure 9 Battery Separator Solenoid located in the battery box Page 11 of 40 Number PM820010 HVAC SmartAir eHVAC System...

Page 12: ...Compressor C Thermal Limit Switch on Compressor This is a normally closed auto reset switch to protect the compressor from high temperature Figure 12 Thermal Limit Switch on Compressor D Evaporator I...

Page 13: ...d Unit has a low volt age disconnect of 11 2 volts 3 Check all fuses See Figure 17 Internal Wiring Diagram Before 8 1 2016 on page 28 and Figure 18 External Wiring Diagram on page 29 4 Check for 12 vo...

Page 14: ...pressor Thermal Limit Switch on page 19 7 Check evaporator blower and linear power module See J Evaporator Blower Motor and Linear Power Module Testing on page 20 8 If all tests check OK a loss of ref...

Page 15: ...d signal compressor or internal com ponent issue Amperage ranges 40 to 75 depending on settings and conditions 4 Check battery management device harness and sep arator 5 Same as 4 Unit is noisy or vib...

Page 16: ...ires and battery cables 2 Check Aux batteries for Voltage Check for heater enable signal from EHVAC unit Heater unit has a low voltage disconnect of 10 6 volts See N Testing the Espar Heater Connected...

Page 17: ...rtAir eHVAC System Heater blows cold air but no heat 1 Fuel 2 Fuel pump 3 Connections 4 Glow pin screen 5 Sensors See Espar Manual Table 2 ESPAR Heating System Diagnostic Table PROBLEM POSSIBLE CAUSE...

Page 18: ...turn the EHVAC unit on if all safety switches are okay such as the high pressure switch temperature sensor freeze switch and the compressor thermal limit switch the Main Compressor controller will con...

Page 19: ...ation on Service Instructions for Ring Terminal Controller and Compressor on page 33 You must remove the cover Do not attempt to test the controller or compressor until you have completely eliminated...

Page 20: ...tage will vary depending on requested speed approximately 1 6 for low 2 6 for high If all voltages are correct and the fan does not run it is defective and needs to be replaced Using a DC ammeter you...

Page 21: ...wiring harness With aux voltage okay LED flashing and 12 volts across pins 8 and 1 start the truck or connect the start batteries to a battery charger and bring the voltage above 13 2 for at least 15...

Page 22: ...ss still connected to control and unit back probe harness You should measure 120 ohms Reconnect the harness to the BMS With all harnesses connected you should measure 60 ohms N Testing the Espar Heate...

Page 23: ...ce unit 3 recover holding charge 4 evacuate leak test 5 recharge proper refrigerant level WARNING Before doing any of the work below be aware of the dangers involved Working with refrigerant could lea...

Page 24: ...y counterclockwise CCW 2 Connect the electronic vacuum gauge to the recov ery station at the vacuum manifold using a valve and T fittings 3 Connect the recovery stations blue hose to the ser vice port...

Page 25: ...nter the system and cause compressor damage NOTE Although your service equipment may appear physi cally different from the equipment shown here the function of the equipment used to perform each servi...

Page 26: ...ecified amount of refrigerant 2 On the recovery station set the high side valve to CLOSED and the low side valve to CHARGE 3 Press the CHARGE button to start the charge proce dure When the system is f...

Page 27: ...Table 4 Discharge Sensor Freeze Switch Testing Chart Page 27 of 40 Number PM820010 HVAC SmartAir eHVAC System...

Page 28: ...I T E GND BLACK COND SIG WHI T E HEATER CONDENSER FAN 12 VOLTS RED CANH YELLOW CANL GREEN HEATER_OPTION RED VEHICLE ACCESSORY INPUT WHI T E IGNITION INPUT WHI T E 12_VOLTS_COMP RED ACCESSORY INPUT WHI...

Page 29: ...HOLE WIRE GAUGE 2AWG WIRE GAUGE 2AWG WEBASTO FUEL OPERATED HEATER GROUND BROWN WHITE ESPAR FUEL OPERATED GROUND HEATER GROUND WHITE HEATER_OPTION RED ESPAR OPTION HEATER_EN BLACK HEATER_LVL BLUE HEAT...

Page 30: ...PLICE_SENSOR GND BLWR FUSED BLWR RLY SIG BLWR RLY SIG 12 VOLTS 12 VOLTS 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 A A B B C C D D E E F F THE INFORMATION HEREON IS CONFIDENTIAL AND PROPRIETARY PROPERTY OF BERGS...

Page 31: ...PWM ground switched output to control condenser fan speed 0V fan off 1 6 2 6V cooling mode Condenser fan 3 way connector C8 C9 C10 C11 C12 C13 BLWR_CTL Blue PWM ground switched output to control blow...

Page 32: ...11 14V Relay in electrical center D11 COND_RLY _SIG White Switch to Ground output to relay 1 Condenser fan power from AUX Batteries 0 5V if on otherwise 11 14V Relay in electrical center D12 BLWR_RLY...

Page 33: ...connector pins identified in FIGURE 1 After the controller with phase harness has been removed from the unit follow the below instructions to replace the phase harness W 1 Remove and retain cover 4 c...

Page 34: ...ls of new harness over threaded posts of PCB and route wires as shown Align each colored wire to specific threaded post identified only 5 Secure wire terminals with 3 nuts Torque to 12 to 14 in lbs Us...

Page 35: ...o avoid potential property damage or personal injury Read Important Safety Warnings and ALL instructions before attempting to install or service product Page 35 of 40 Number PM820010 HVAC SmartAir eHV...

Page 36: ...o avoid potential property damage or personal injury Read Important Safety Warnings and ALL instructions before attempting to install or service product Page 36 of 40 Number PM820010 HVAC SmartAir eHV...

Page 37: ...SPEED press ENTER until display shows FAN and SPEED Press up or down arrows to select 1 2 3 speed After 5 seconds selection will be set See Figure 22 Figure 22 Changing Blower Speeds ENTER Changing TE...

Page 38: ...1 02 etc Use up and down arrows to scroll through the Fault Codes See fault code chart for definitions Table 6 Fault Code List Code Failure Description Solution O1 Evaporator Sensor Shorted high or mi...

Page 39: ...open or shorted high 2 Evaporator sensor shorted low 3 High pressure switch open or shorted high Figure 26 Enter Service Mode ENTER ON OFF 13 HMI Temperature Sensor Error BLUETOOTH Controller only Sys...

Page 40: ...t Amperage draw Pressing ENTER arrow after viewing service screen will return you to the fault code screen Pressing the ON OFF button will return you to the Tem perature Display screen Figure 27 Servi...

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